1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615db90be6a6fbc4e895e34143e2c2a2caabb26d76b4ccf5b77348f37f107525. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eae8c77b-af91-4f69-8724-de3a4ad928f5.json and https://artists.proofprofile.net/proofs/artist/eae8c77b-af91-4f69-8724-de3a4ad928f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe547a53e05a4402a25e6b5ad82c4f671b5cfdb2090a6afa02a85f29b395429c2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:38:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHX2428660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b86e409d2e8e288427a767f353b4b3729d61603d0d9e1ac109fc5127ffe06e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:42:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHX2444591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacae0ace114cb91e5137dedb7dad0a6f78c725688a1a80e17108d8424b8b23ba. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHX2444535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb823c816fed828651a38dab79ec3a6d4b4933c6d34c0ec547783fec1c5306513. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHX2444247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9502fbdad79d5b651658d19c62b45e2bc95dbd1fe841a4206ee71adc3d10a7bf. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHX2443797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbb9c1f5ba6750fa94308520af53221d00ed457faffe4043b995afedcad2f79. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHX2444361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc4e82216f4241c31eabc72a70a570e932d5f36feb0b796d8ac12cbb71f26e4. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHX2469473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85d11b5fa59ce27409b53d434b85901bd80330607c7434b095425fbe5ea4d2e. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHX2469511.